85944289 has 2 divisors, whose sum is σ = 85944290. Its totient is φ = 85944288.

The previous prime is 85944283. The next prime is 85944301. The reversal of 85944289 is 98244958.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53363025 + 32581264 = 7305^2 + 5708^2 .

It is a cyclic number.

It is not a de Polignac number, because 85944289 - 2³ = 85944281 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85944281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42972144 + 42972145.

It is an arithmetic number, because the mean of its divisors is an integer number (42972145).

Almost surely, 2^85944289 is an apocalyptic number.

It is an amenable number.

85944289 is a deficient number, since it is larger than the sum of its proper divisors (1).

85944289 is an equidigital number, since it uses as much as digits as its factorization.

85944289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 829440, while the sum is 49.

The square root of 85944289 is about 9270.6142730673. The cubic root of 85944289 is about 441.3051622327.

The spelling of 85944289 in words is "eighty-five million, nine hundred forty-four thousand, two hundred eighty-nine".